Until just over a decade ago, ring systems were thought to be exclusive to the giant planets of the solar system, such as Jupiter, Saturn, Uranus and Neptune. However, in 2013, a small body barely 250 kilometers (155 miles) in diameter, located at nearly 17 times the Earth–sun distance, joined thi s small group. The object is Chariklo, a small body orbiting between Saturn and Uranus, around which astronomers discovered two dense rings. ...read more read less